+# -*- coding: utf-8 -*-
+#
# Copyright 2012 GRNET S.A. All rights reserved.
#
# Redistribution and use in source and binary forms, with or
# interpreted as representing official policies, either expressed
# or implied, of GRNET S.A.
+"""This module hosts OS-specific code for Linux"""
+
from image_creator.os_type.unix import Unix, sysprep
import re
class Linux(Unix):
+ """OS class for Linux"""
def __init__(self, rootdev, ghandler, output):
super(Linux, self).__init__(rootdev, ghandler, output)
self._uuid = dict()
self._persistent = re.compile('/dev/[hsv]d[a-z][1-9]*')
- def is_persistent(self, dev):
- return not self._persistent.match(dev)
+ @sysprep(enabled=False)
+ def remove_user_accounts(self, print_header=True):
+ """Remove all user accounts with id greater than 1000"""
- def get_uuid(self, dev):
- if dev in self._uuid:
- return self._uuid[dev]
+ if print_header:
+ self.out.output("Removing all user accounts with id greater than "
+ "1000")
- uuid = self.g.vfs_uuid(dev)
- assert len(uuid)
- self._uuid[dev] = uuid
- return uuid
+ if 'USERS' not in self.meta:
+ return
+
+ # Remove users from /etc/passwd
+ passwd = []
+ removed_users = {}
+ metadata_users = self.meta['USERS'].split()
+ for line in self.g.cat('/etc/passwd').splitlines():
+ fields = line.split(':')
+ if int(fields[2]) > 1000:
+ removed_users[fields[0]] = fields
+ # remove it from the USERS metadata too
+ if fields[0] in metadata_users:
+ metadata_users.remove(fields[0])
+ else:
+ passwd.append(':'.join(fields))
+
+ self.meta['USERS'] = " ".join(metadata_users)
+
+ # Delete the USERS metadata if empty
+ if not len(self.meta['USERS']):
+ del self.meta['USERS']
+
+ self.g.write('/etc/passwd', '\n'.join(passwd) + '\n')
+
+ # Remove the corresponding /etc/shadow entries
+ shadow = []
+ for line in self.g.cat('/etc/shadow').splitlines():
+ fields = line.split(':')
+ if fields[0] not in removed_users:
+ shadow.append(':'.join(fields))
+
+ self.g.write('/etc/shadow', "\n".join(shadow) + '\n')
+
+ # Remove the corresponding /etc/group entries
+ group = []
+ for line in self.g.cat('/etc/group').splitlines():
+ fields = line.split(':')
+ # Remove groups tha have the same name as the removed users
+ if fields[0] not in removed_users:
+ group.append(':'.join(fields))
+
+ self.g.write('/etc/group', '\n'.join(group) + '\n')
+
+ # Remove home directories
+ for home in [field[5] for field in removed_users.values()]:
+ if self.g.is_dir(home) and home.startswith('/home/'):
+ self.g.rm_rf(home)
+
+ @sysprep()
+ def cleanup_passwords(self, print_header=True):
+ """Remove all passwords and lock all user accounts"""
+
+ if print_header:
+ self.out.output("Cleaning up passwords & locking all user "
+ "accounts")
+
+ shadow = []
+
+ for line in self.g.cat('/etc/shadow').splitlines():
+ fields = line.split(':')
+ if fields[1] not in ('*', '!'):
+ fields[1] = '!'
+
+ shadow.append(":".join(fields))
+
+ self.g.write('/etc/shadow', "\n".join(shadow) + '\n')
@sysprep()
def fix_acpid(self, print_header=True):
event_exp = re.compile('event=(.+)', re.I)
action_exp = re.compile('action=(.+)', re.I)
- for f in self.g.readdir(events_dir):
- if f['ftyp'] != 'r':
+ for events_file in self.g.readdir(events_dir):
+ if events_file['ftyp'] != 'r':
continue
- fullpath = "%s/%s" % (events_dir, f['name'])
+ fullpath = "%s/%s" % (events_dir, events_file['name'])
event = ""
action = ""
for line in self.g.cat(fullpath).splitlines():
- m = event_exp.match(line)
- if m:
- event = m.group(1)
+ match = event_exp.match(line)
+ if match:
+ event = match.group(1)
continue
- m = action_exp.match(line)
- if m:
- action = m.group(1)
+ match = action_exp.match(line)
+ if match:
+ action = match.group(1)
continue
if event.strip() in ("button[ /]power", "button/power.*"):
@sysprep()
def use_persistent_block_device_names(self, print_header=True):
"""Scan fstab & grub configuration files and replace all non-persistent
- device appearences with UUIDs.
+ device references with UUIDs.
"""
if print_header:
self.out.output("Replacing fstab & grub non-persistent device "
- "appearences")
+ "references")
# convert all devices in fstab to persistent
persistent_root = self._persistent_fstab()
self._persistent_grub1(persistent_root)
def _persistent_grub1(self, new_root):
+ """Replaces non-persistent device name occurencies with persistent
+ ones in GRUB1 configuration files.
+ """
if self.g.is_file('/boot/grub/menu.lst'):
grub1 = '/boot/grub/menu.lst'
elif self.g.is_file('/etc/grub.conf'):
roots = self.g.aug_match('/files%s/title[*]/kernel/root' % grub1)
for root in roots:
dev = self.g.aug_get(root)
- if not self.is_persistent(dev):
+ if not self._is_persistent(dev):
# This is not always correct. Grub may contain root entries
# for other systems, but we only support 1 OS per hard
# disk, so this shouldn't harm.
self.g.aug_close()
def _persistent_fstab(self):
+ """Replaces non-persistent device name occurencies in /etc/fstab with
+ persistent ones.
+ """
mpoints = self.g.mountpoints()
if len(mpoints) == 0:
pass # TODO: error handling
return root_dev
def _convert_fstab_line(self, line, devices):
+ """Replace non-persistent device names in an fstab line to their UUID
+ equivalent
+ """
orig = line
line = line.split('#')[0].strip()
if len(line) == 0:
dev = entry[0]
mpoint = entry[1]
- if not self.is_persistent(dev):
+ if not self._is_persistent(dev):
if mpoint in devices:
- dev = "UUID=%s" % self.get_uuid(devices[mpoint])
+ dev = "UUID=%s" % self._get_uuid(devices[mpoint])
entry[0] = dev
else:
# comment out the entry
return orig, dev, mpoint
+ def _do_collect_metadata(self):
+ """Collect metadata about the OS"""
+ super(Linux, self)._do_collect_metadata()
+ self.meta["USERS"] = " ".join(self._get_passworded_users())
+
+ # Delete the USERS metadata if empty
+ if not len(self.meta['USERS']):
+ self.out.warn("No passworded users found!")
+ del self.meta['USERS']
+
+ def _get_passworded_users(self):
+ """Returns a list of non-locked user accounts"""
+ users = []
+ regexp = re.compile('(\S+):((?:!\S+)|(?:[^!*]\S+)|):(?:\S*:){6}')
+
+ for line in self.g.cat('/etc/shadow').splitlines():
+ match = regexp.match(line)
+ if not match:
+ continue
+
+ user, passwd = match.groups()
+ if len(passwd) > 0 and passwd[0] == '!':
+ self.out.warn("Ignoring locked %s account." % user)
+ else:
+ users.append(user)
+
+ return users
+
+ def _is_persistent(self, dev):
+ """Checks if a device name is persistent."""
+ return not self._persistent.match(dev)
+
+ def _get_uuid(self, dev):
+ """Returns the UUID corresponding to a device"""
+ if dev in self._uuid:
+ return self._uuid[dev]
+
+ uuid = self.g.vfs_uuid(dev)
+ assert len(uuid)
+ self._uuid[dev] = uuid
+ return uuid
+
# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :
projects / snf-image-creator / blobdiff